Siemens SINAMICS S120 Equipment Manual page 269

Preparatory steps
● Disconnect the drive line-up from the power supply
● Allow unimpeded access to the power block
● Remove the front cover
Removal
The removal steps are numbered in accordance with the figure.
1. Unscrew the connection to the line or to the motor (3 screws).
2. Unscrew the connection to the DC link (4 screws).
3. Remove the retaining screws at the top (2 screws).
4. Remove the retaining screws at the bottom (2 screws).
5. Remove the DRIVE-CLiQ cables and connections on –X41 / –X42 (5 plugs).
6. Remove the mounts for the slide-in electronics unit (2 nuts) and carefully remove the
7. Disconnect the plug-in connections for the fiber-optic cables and signal cables (5 plugs).
8. Disconnect the plug for the thermocouple.
9. Unscrew the two retaining screws for the fan and attach the equipment for assembling
You can now remove the power block.
CAUTION
When removing the power block, ensure that you do not damage any signal cables.
Installation steps
For installation, carry out the above steps in reverse order.
CAUTION
The tightening torques specified in the table "Tightening torques for connecting current-
conducting parts" must be observed.
Carefully establish the plug-in connections and then ensure that they are secure.
The fiber-optic cable plugs must be remounted at their original slot. Fiber-optic cables and
sockets are accordingly labeled for correct assignment (U11, U21, U31).
Chassis power units
Manual, (GH3), 10/2008, 6SL3097-2AE00-0BP3
slide-in electronics unit.
When removing the slide-in electronics unit, you have to disconnect 5 further plugs one
after the other (2 at the top, 3 below).
the power block at this position.
Maintenance and Servicing
8.4 Replacing components
269